Thanks for your help. Another question, when doing a water change on the main tank, could I use some of that water and add it to the QT?
And if I've had the QT filter running on the main tank alongside my other filter, then in theory shouldn't it should already have the good bacteria developed and be able to be used right away on the QT? I suppose I'm confused as to how often you need to cycle the QT tank. If you notice a sick fish and want to treat it asap, then in theory you'd need to transfer it right away to the QT tank. If you had already prepped the QT filter by letting that accumulate good bacteria, then you can just put that on a QT tank and add saltwater and you're good to go right away?? Thanks again.